Abstract:
:Peroxynitrite is a strong oxidant that reacts with a variety of biomolecules in vivo and in vitro. When rat thymocytes in phosphate buffer are exposed to 25 microM peroxynitrite for 10 min, DNA single strand breaks (SSB) can be detected. These SSB are repaired if the cells are incubated in fresh media at 37 degrees C for 120 min. In addition, DNA protein cross-links and apoptosis are observed 1 and 6 h, respectively, after peroxynitrite exposure. Peroxynitrite mediates the formation of thiobarbituric acid-reactive substances (TBARS) that may be responsible for the DNA-protein crosslinks (DPXL). Both TBARS and DPXL formation are lowered by posttreating the cells immediately after the 10-min exposure to peroxynitrite with Trolox, a water-soluble vitamin E analog. These results suggest that oxidative stress mediated by peroxynitrite can trigger a critical sequence of events ending in programmed cell death and that intracellular oxidation is a component of the apoptosis of thymocytes, since both oxidative processes and apoptosis can be prevented by Trolox. In addition to Trolox, we obtained partial data on three other phenolic antioxidants (3-tert-butyl-4-hydroxyanisole, butylated hydroxytoluene, and 2,6-diisopropylphenol). We find that Trolox and these three phenols similarly protect rat thymocytes from apoptosis mediated by peroxynitrite.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Salgo MG,Pryor WAdoi
10.1006/abbi.1996.0418subject
Has Abstractpub_date
1996-09-15 00:00:00pages
482-8issue
2eissn
0003-9861issn
1096-0384pii
S0003-9861(96)90418-Xjournal_volume
333pub_type
杂志文章abstract::Stimulation of pig peripheral blood lymphocytes with concanavalin A (Con A) provoked a rapid increase (two- to threefold) in the rate of ouabain-inhibitable K+ uptake observable within 3-10 min of stimulation with mitogen. At least two phases can be distinguished in the activation of the Na+/K+ pump: the early phase (...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90059-2
更新日期:1987-02-01 00:00:00
abstract::Extracellular ATP is known to increase the membrane permeability of a variety of cells. Addition of ATP to human leukemic lymphocytes loaded with the Ca2+ indicator, fura-2, induced a rise in cytosolic Ca2+ concentration which was attenuated or absent in NaCl media compared with KCl, choline Cl, or NMG Cl media. In co...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90010-t
更新日期:1992-02-01 00:00:00
abstract::The electron paramagnetic resonance (EPR) signal of the tyrosyl radical attributed to ribonucleoside diphosphate reductase decreases after treatment of promyelocytic leukemic HL60 cells with 2-formylpyridine thiosemicarbazonato copper(II) (CuL). According to EPR studies, CuL forms adducts with both histidine and cyste...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90429-m
更新日期:1991-09-01 00:00:00
abstract::Advances in management have resulted in a dramatic decline in mortality for individuals infected with human immunodeficiency virus (HIV). This decrease in mortality, initially the result of improved prophylaxis and treatment of opportunistic infections but later mediated by the use of highly-active antiretroviral ther...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2010.07.029
更新日期:2010-11-01 00:00:00
abstract::The biosynthesis of one riboflavin molecule requires one molecule of GTP and two molecules of ribulose 5-phosphate as substrates. GTP is hydrolytically opened, converted into 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione by a sequence of deamination, side chain reduction and dephosphorylation. Condensation with 3,...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2008.02.008
更新日期:2008-06-15 00:00:00
abstract::Phosphofructokinase was purified from muscle tissue of two different molluscs, edible snails, Helix pomatia (gastropoda), and mussels, Mytilus edulis (bivalvia). Under denaturing conditions, both enzymes had a molecular mass of 82 kDa. In the presence of ATP-Mg2+, the enzymes were rapidly phosphorylated in vitro by th...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90477-z
更新日期:1991-06-01 00:00:00
abstract::The soluble enzymatic luminescent system of the dinoflagellate Pyrocystis lunula (luciferase-luciferin) is coupled with an enzymatic NAD(P)H-dependent reaction. The enzyme is a soluble reductase (Mr 47,000) which catalyzes, in the presence of NAD(P)H, the reduction of a molecule called P630. Reduced P630 has the same ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90357-7
更新日期:1986-12-01 00:00:00
abstract::A catalase-related allene oxide synthase (cAOS) and true catalases that metabolize hydrogen peroxide have similar structure around the heme. One of the distal heme residues considered to help control catalysis is a highly conserved asparagine. Here we addressed the role of this residue in metabolism of the natural sub...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2008.07.011
更新日期:2008-09-15 00:00:00
abstract::Studies have followed the turbidity (OD400 nm) of beta-casein (CN) as temperature (T) increased from 4 to 37 degrees C. Native non-phosphorylated beta-CN showed a turbidity increase above 25 degrees C and precipitated at about 22 degrees C in 5mM Ca+2. These patterns were reproducible upon T-cycling while those of rec...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2006.07.008
更新日期:2006-10-01 00:00:00
abstract::Lipophosphoglycan (LPG) is the major surface glycoconjugate of Leishmania donovani promastigotes and is composed of a capped polymer of repeating PO4-6Gal(beta 1,4)Man alpha 1 disaccharide units linked via a phosphosaccharide core to a lyso-1-O-alkylphosphatidylinositol anchor. An exogenous acceptor composed of the gl...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(92)90523-y
更新日期:1992-06-01 00:00:00
abstract::An NAD-preferring glucose 6-phosphate dehydrogenase of Acetobacter hansenii (formerly known as Acetobacter xylinum) has been purified to apparent homogeneity and kinetically characterized. The purified enzyme was stabilized by the use of glycerol, MgSO4, and 2-mercaptoethanol at pH 5.4. The molecular weight of the enz...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1179
更新日期:1994-05-01 00:00:00
abstract::Glyoxalase I, a member of the metalloglutathione (GSH) transferase superfamily, plays a critical detoxification role in cells by catalyzing the conversion of cytotoxic methylglyoxal (as the diastereomeric GSH-thiohemiacetals) to S-D-lactoylglutathione via a 1,2-hydrogen transfer. The mechanism-of-action of this Zn2+-m...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1006/abbi.2000.2253
更新日期:2001-03-01 00:00:00
abstract::Mitogens increase prostaglandin synthesis in fibroblasts. In the present studies, transcriptional activation of the prostaglandin G/H synthase isoenzyme 2 (PGHS-2) gene is shown to be responsible for this induction. Transcription of the PGHS-2 gene maximally increased within 15 min of stimulation, and elevated cellula...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1496
更新日期:1993-10-01 00:00:00
abstract::The cationic protein, lysozyme, is present in cartilage but its precise role in this tissue has not yet been established. This study shows that two major and structurally similar glycosaminoglycans (GAGs) of cartilage, i.e., chondroitin sulfate (CS) and hyaluronan (HA) interact with lysozyme at salt concentrations up ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1994.1134
更新日期:1994-04-01 00:00:00
abstract::Thymidylate synthase (TS) is an essential enzyme that must be expressed in all proliferating cells. The mouse TS promoter lacks a TATA box and an initiator element and initiates transcription over a broad region in cultured fibroblasts. The goal of this study was to determine if expression of the TS gene in a variety ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1999.1523
更新日期:1999-12-15 00:00:00
abstract::Conversion of geranyl pyrophosphate to cyclic monoterpenes is considered to involve the preliminary isomerization of this acyclic precursor to enzyme-bound linalyl pyrophosphate and the cyclization of this tertiary intermediate. 2-Fluorogeranyl pyrophosphate and 2-fluorolinalyl pyrophosphate are effective competitive ...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90390-5
更新日期:1986-12-01 00:00:00
abstract::Human seminal fluid was recently found to contain 18,19-dehydroprostaglandins E1 and E2 (E. H. Oliw, H. Sprecher, and M. Hamberg, (1986) J. Biol. Chem. 261, 2675-2683). In the present study, the cis and trans isomers of 18,19-dehydroprostaglandins E1 and E2 were prepared by incubation of microsomes of ram vesicular gl...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90345-6
更新日期:1987-10-01 00:00:00
abstract::Using specific testosterone 16 alpha-hydroxylase activity as the basis for selection of fractions during purification, the cytochrome P-450 ("I"-P-450(16)alpha) has been isolated from livers of phenobarbital-treated 129/J female mice [K. Devore, N. Harada, and M. Negishi (1985) Biochemistry, 24, 5632-5637]. An antibod...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(86)90655-7
更新日期:1986-02-01 00:00:00
abstract::Phosphatidylserine (PS) is predominantly confined to the inner leaflet of plasma membrane in cells, but it is externalized on the cell surface during apoptosis. This externalized PS is required for effective phagocytosis of apoptotic cells by macrophages. Because PS trans-bilayer asymmetry is not absolute in different...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(03)00083-3
更新日期:2003-05-01 00:00:00
abstract::Novel vitamin D3 derivatives, 26-homo-delta 22-1 alpha,25(S)-dihydroxyvitamin D3 and 26-homo-delta 22-1 alpha,25(R)-dihydroxyvitamin D3 were compared with the native hormone, 1,25-dihydroxyvitamin D3, and with other vitamin D3 derivatives, in inhibition of cell growth, induction of phenotypic differentiation, and c-my...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(90)90725-e
更新日期:1990-02-01 00:00:00
abstract::We demonstrate that the efficiency of adenovirus-assisted exogenous Ca(2+) ATPase (SERCA) and reporter (EGFP) gene expression is much higher in primary cultures of myocytes from neonatal rat hearts, than in primary cultures of myocytes from adult rat hearts. In this respect, the neonatal myocytes behave similarly to t...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(03)00258-3
更新日期:2003-07-15 00:00:00
abstract::Studies in eucaryotic cells (mainly animals and yeast) indicate that at least two DNA polymerases are involved in DNA replication at the level of the replication fork: DNA polymerase alpha, which is associated with DNA primase, is involved in the replication of the lagging strand; DNA polymerase delta, associated with...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(91)90399-4
更新日期:1991-05-15 00:00:00
abstract::Diethyl dithiocarbamate (DDC) was used to inhibit the copper- and zinc- containing superoxide dismutase (Cu,ZnSOD) of Escherichia coli in order to expose its physiological function. DDC inhibited the aerobic growth of a sodA sodB mutant much more than it did the growth of a SOD-replete parental strain and this inhibit...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1996.0117
更新日期:1996-03-15 00:00:00
abstract::In this work we demonstrate that aldose reductase (AR) interacts directly with tubulin and, was subjected to microtubule formation conditions, enzymatic AR activity increased more than sixfold. Since AR interacts mainly with tubulin that has 3-nitro-tyrosine in its carboxy-terminal, we evaluated whether tyrosine and o...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2018.07.009
更新日期:2018-09-15 00:00:00
abstract::Heme and iron are essential to almost all forms of life. The strict maintenance of heme and iron homeostasis is essential to prevent cellular toxicity and the existence of systemic and intracellular regulation is fundamental. Cytosolic heme can be catabolized and detoxified by heme oxygenases (HOs). Interestingly, fre...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章,评审
doi:10.1016/j.abb.2019.108071
更新日期:2019-09-15 00:00:00
abstract::Pneumococcal surface protein A (PspA) is present on the cell wall of Streptococcus pneumoniae pathogen and has an antigenetically variable N-terminal domain. This aminoterminal domain is essential for full pneumococcal virulence, and monoclonal antibodies raised against it protect mice against pneumococcal infections....
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1999.1544
更新日期:2000-01-01 00:00:00
abstract::To study the relationship between neutral aminopeptidase activity and hemoglobin accumulation in malaria parasites, we treated mice infected with Plasmodium berghei NYU-2 with chloroquine intraperitoneally in doses ranging from 0.3 to 3 micromol per 25 g mouse. Preparations of infected erythrocytes (normalized to repr...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/s0003-9861(02)00688-4
更新日期:2003-02-15 00:00:00
abstract::We have successfully prepared E- and Z- isomers of 17-20 dehydro analogs of 2-methylene-19-nor-(20S)-1alpha,25-dihydroxyvitamin D3 (2MD). Both isomers bind to the recombinant rat vitamin D receptor (VDR) with high affinity. The Z-isomer (Vit-III 17-20Z) displays activity in vivo and in vitro that is similar to 2MD. Th...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/j.abb.2006.11.029
更新日期:2007-04-15 00:00:00
abstract::Platelet-activating factor (PAF) plays an important role in a number of biological processes ranging from inflammation to reproductive biology. We have reported that the enzyme that inactivates this potent autacoid, PAF-acetylhydrolase (PAF-AH), is decreased in maternal plasma during the latter stages of pregnancy. Th...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1006/abbi.1993.1144
更新日期:1993-03-01 00:00:00
abstract::By anion-exchange chromatography, the nitrogen fixing photosynthetic stem nodules and nonphotosynthetic root nodules of Sesbania rostrata are shown to contain the same seven major components of leghemoglobin (Lb), numbered LbI-LbVII in order of elution, although in different proportions. No novel component was found i...
journal_title:Archives of biochemistry and biophysics
pub_type: 杂志文章
doi:10.1016/0003-9861(87)90102-0
更新日期:1987-04-01 00:00:00